Elements Compounds And Mixtures Question Preview (ID: 43523)

8th Grade Review Of Elements Compounds And Mixtures. TEACHERS: click here for quick copy question ID numbers.

Air is
a) an element
b) a compound
c) a pure substance
d) a mixture

Which of the following does NOT describe elements?
a) all the particles are alike
b) can be broken down into simpler substances and retain the characteristics of the element
c) have unique sets of properties
d) can join together to form compounds

Which of the following sentences best describes table salt?
a) Salt is a compound made from two elements
b) salt is an element made from two mixtures
c) salt is a mixture made from two elements
d) Salt is a pure substance made from two compounds

Because zinc can combine with other substances but cannot be changed into a simpler substance by an ordinary chemical process, zinc is classified as
a) a mixture
b) a compound
c) an element
d) a solution

Which of these is NOT considered a pure substance
a) an atom
b) an element
c) a compound
d) a mixture

Which of the following substances can be separated into simpler substances only by chemical means?
a) sodium
b) salt water
c) water
d) gold

Which of the following describes a mixture?
a) formed from two or more substances chemically combine
b) made up of two or more substances joined in a specific ratio
c) made up of two or more substances that keep their identities
d) can be separated only by chemical means

What is a pure substance made of two or more elements that are chemically combined?
a) element
b) compound
c) mixture
d) solutions

Italian dressing is
a) a element
b) a compound
c) a heterogeneous mixture
d) a homogeneous mixture

Which of the following is a compound
a) Carbon (C)
b) Carbon Monoxide (CO)
c) Copper (Cu)
d) club soda

How is a mixture different from a compound?
a) Mixtures have two or more components
b) Each substance in a mixture keeps its identity.
c) Mixtures are commonly found in nature.
d) Solids, liquids and gases can form mixtures.

A material is only a mixture if
a) you can physically separate the different components.
b) you can always see all the components.
c) it develops its own set of characteristic properties.
d) all of the above

. A dish is given to you, which contains a blackish-yellow powder. When you move a magnet over it, you are amazed to see black particles, (which you find out are iron) fly upwards and get stuck to the magnet, and all that's left in the dish is a yel
a) element
b) compound
c) pure substance
d) mixture

What type of mixture is salad
a) heterogeneous
b) homogeneous
c) solutions
d) salad is not a mixture

A solution is always a
a) homogeneous mixture
b) heterogeneous mixture
c) pure substance
d) liquid

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